Compact Miniature Current Transformer

We manufacture the miniature current transformers by high permeability soft iron cores and high grade enamel wires, and get very compact size and high linearity. The CTs which are wrapped by insulation tapes and heat-shrink sleeves, usually have more compact size and larger through-holes than plastic case CTs or metal sheild type CTs. Busbar built-in type CTs are more convenient for installation. We can assist in custom design current transformers, and provide samples within a couple of days.


  • 10(80)A/5mA, Rb=10Ω, turns ratio 1:2000
  • Max current 80A, accuracy 0.1 class
  • Winding coil double insulated, OD Φ24.6mm
  • U shape busbar 2-Φ5mm for mounting, distance 20mm
  • Quick prototype development and sampling


Part NumberMSB80-20B
DescriptionCompact Miniature Current Transformer
Structure Of WindingToroidal
Input / Output10(80)A/5mA
Max. Current80 A
Turns Ratio (typical)1:2000
Burden (Rb)10 Ω
Accuracy Class0.1 Class
Phase Shift Error5′ (20% Rated Current)
Core InsideHigh Permeability Nanocrystalline Core
EncapsulationDouble Insulation
Busbar TypeBuilt-in
Mounting MethodCopper Rod
ApplicationMeters, Instruments
Accept CustomizedYes


MSB80-20B, Compact Miniature Current Transformer
MSB80-20B, Compact Miniature Current Transformer

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Compact Miniature Current Transformer
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